Patents by Inventor William K. Richardson

William K. Richardson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods and apparatuses for determining the number of printed pages remaining in a toner cartridge
    Patent number: 7747180
    Abstract: A method for determining the number of printed pages remaining in a toner cartridge for an electrophotographic image forming device. A toner cartridge and electrophotographic image forming device for storing and/or performing aspects of the method is also provided.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: June 29, 2010
    Assignee: Lexmark International, Inc.
    Inventors: Joel P. Wittenauer, William K. Richardson, James A. Carter, II
  • Methods and apparatuses for determining the number of printed pages remaining in a toner cartridge
    Publication number: 20080298823
    Abstract: A method for determining the number of printed pages remaining in a toner cartridge for an electrophotographic image forming device. A toner cartridge and electrophotographic image forming device for storing and/or performing aspects of the method is also provided.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Inventors: Joel P. Wittenauer, William K. Richardson, James A. Carter, II